In the Bradshaw Lab, our work on disease spread encompasses a broad spectrum of research activities focusing on understanding and managing the spread of plant diseases, particularly those caused by fungi. Our studies delve into the evolutionary dynamics of pathogens, combining data from host range, virulence, and comparative genomics. This integrated approach helps us understand how pathogens adapt and evolve to exploit different hosts across various environments. We actively track the spread of pathogens through time and space, using both freshly collected and herbarium specimens. Collaborations with industry partners around the world enhance our understanding of how pathogens invade new areas. Our research is not limited to agricultural crops; it also includes ecological species, enhancing our understanding of disease patterns in various contexts. Through host range and virulence assays, we investigate phylogenetic signals in disease distribution and severity.

Invasive plant pathogens can cause substantial damage to ecosystems globally, with global trade and plant importation often introducing harmful plant pathogens to new regions. These introductions can lead to major declines in host tree populations and, in some cases, functional extinction of certain species. Managing these non-native fungal pathogens is particularly challenging due to their small size and the possibility of arriving undetected on asymptomatic host plants. Fungi, often overlooked in studies of biological invasions, are valuable for understanding ecological and evolutionary processes in pathogen success in new environments. Herbarium specimens of fungal plant pathogens provide unique insights into the evolutionary history of pathogen-host interactions, helping us track the introduction and spread of detrimental plant pathogens, and aiding in understanding the epidemiology of plant diseases. This includes addressing a wide range of ecological, evolutionary, and pathological questions related to plant disease dynamics. Overall, our research aims to enhance our understanding of how plant pathogens, particularly fungi, spread and impact ecosystems, which is vital for developing effective management strategies for these invasive species.